use kube_name on namespace (#37)

Co-authored-by: Pavel <win10@list.ru>

Author: gpkc

fastapi_template/template/{{cookiecutter.project_name}}/deploy/kube/namespace.yml

@@ -2,6 +2,6 @@
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: "{{cookiecutter.project_name}}"
+  name: "{{cookiecutter.kube_name}}"
 
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